Ammonia-condenser.



B. WALTER.

MOI MIDIIII. I

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AKHOm-COI'DINIII.

Specification of Letters latent.

Patented Feb. 8, 191%.

Application lllett Ieventber l0, 1W8. man 150. L880.

Toall whom it ma concern:

lie it known tmt l, Bltt'ttl Wan-rm, a citizen of thc linitcd States, residing at liltsbul'g. in the State of Pennsylvania,

have invented certain new and useful 1mprm'emcnts iu Ammonia-tondensers, of which the following is a specification.

My invention is particularly designed to rovidc a cmulcnscr such as used in ice-making plants, which shall be economical in the use of the cooling water and thoroughly clticieut in reducing the ammonia gas to. a liquid state.

Another object is to provide for read ly cleaning the water ipcs and generally to chcapen and simpli y the construction and increase the cfliciency of such condensers.

I have illustrated the invention in one form in the accmnpiinyin drawing, wherein-- Fignre 1 is a si e elevation with some parts broken away, showin a section of the complete condenser; and ig. 2 is a plan view of the same.

For etiicient operation of such condensers it is neceaaa to provide for intimate contact with the surlaces of the coolin element,

and meanwhile to immediately an continuously remove the liquid condensed ammonia from the cooling surfaces. 1 have also found the clliciency much increased by obtainin a of the ow of t to gas. it is also lnrghiy desirable to arrange thigrooliugz pipes or easy cleaning, and to provide fordownwatd flow of: the gas, while t to water flows upwardly, so'that the coldest wait-r is in contact with the coolant gas. Thus in tluuccom anying drawinghave shown a cylindrical shell 3 which as open at the to) and elected atthe bottom by head 4 and am an inlet 5 for the water, and on oath-t 0 for removal of the water by ovcrtiow. Near the to of the shell 8 i provide a drnlnlwnd 7 which is perforated to receive a series of water pipes 8 fixed therein, and at the bottom a similar pen foratcd head 9; the two heads 7 and 9, with the iipea 8 make a closed space between the has By this means it will be seen that it is easy to insert a tool from the top of the shell into them water pipes and clean them the operation though when desired tie ct'ritua collcc 'inchc bottom of the shell may be removed by way of the valvcd'pipe 10, or the manhole 15.

ltctwccn the heads 7 and 9, 'l rovidc a 1 metal hclicoid ll-which closely tits the uhell :l and a central supporting tube 12, so an to fomi a continuous closed passage from the gas iniet 13 to the condensed ammonia outlet 14 at the bottom. 'lihe hclicoid 11 is made with a decreasing pitch from the top downward, so that the pasuage for the ammonia gas is 'radually decreased in volume as the gas tvcreascs in volume and the surface upon which any condensed ammonia runs downward is gradually h-ascm-d in inclination; so that the ammonia gas and liquid, travel at uniform speed toward the cooler portion of the condenser. Meantime by reason of the construction, the gas is forced into intimate contact with a grcat number of cooling surinccs- 8, while any portion which becomes liquefied is inuuediatcly carried down on the surface it out of the way of the gas.

It will be a parent to those familiar with the art that by this construction 1 obtain great etticicncy by reason of avoiding tluctuations in the progressive coolin of the gas as it travels downward, guided the graduated hclicoid 11, and at the aame time increase the efl'ieiency of the cooling pipes b causing the gen to pass several times throng l all of them. while providing for removal of any condensed parts immediately and u'evcuting the liquid standing still so that.

it might be again gasilicd and taken up. it

will also be plain that l have u. great ad vanta'ge in allowing ready amecs to the water pi as for cleaning them out at any time, ant without even stopping the flow of water.

In order to take advantage of the fact that the rate of heat transfer in such devicca is greater at hi her velocities of the as, I may decrease t o inclination of the iciicoid still more rapidly so that the velocity the gas will increase toward the bottom of the condenser. However, in any case it ought not to decrease.

Having thus described at" invention and illustrated its use, what I clhim as new rad desire to secure by Letters Patent, is the followin'z' 1. a shell with two perforated heads afd an open, space above tho upper head, Wtlll'l inEl-iittiihlinecting'; the heads, and means providing continuous gas passage betwccn the pipes havin a continuous inclined bottom for carrying 05! the liquid a" it is condensed.

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